stooiwell



GOMMUTATOR BRUSH.

N0. 33?;887. Patented Mar.. 15, 1836.

Ul "ELL, 0F CLELCVELAED, ORIG, A SSIGNGR- TO' @TREC MOTOR COMPANY, OF SAME Pijl/LCE.

.PEGZFECATIIH forming parl; of Leiters Pant Il'o. E'Brf, dated March l5, ILS-JG,

Applicalicn filed February 26 i885. Serial No. 157,097. (No model.)

2o :sco-wing or; improved commulol'or Wllccl hrirslic` 1 cciiou oud ille commutatorf liorizonal section of thc dc- W Fig. Sis a (lcfiil View latorwvhccls and thc arm 25 Ll removed, from theoochorc vicws illusrating21u ucd rc' cv ich whccishuviug lf-Shaped pcriphericc fr: correspondingly shaped groovcs l couumzrtor-rlug.

"' l havo illustrated a pair oi' s1 c of the eomuiutator-ring, iS of contact ou cach side of "cu, This double contact is 'pucuc January 55, 1884, oli'a'iouse however, that, so features *of my invention ng employed, as illustrated, lle c' ating from hc cud plato. "S formel? 'willi two cylindrical l 'fus of which grcl'craoly lic in aro from cho ccutcr of the coru- ,ulach comzuumtor-whecl brush (llc El. A spring linger, F, is bolted to one sido of the bilhrcatcd cud e of rho brush-Spinfllc and hours upon tho projeclug cud of the journal of the wheel-brush. The effect of this is to cause the foce of thc wliccl ou thc side opposite lo the spring to run in contact with thc arm i wlxichitis mounted.

As the brush-whom, spimlc E, anni the casting A are 'ormcll of brasa-a good contactbctvccu thc whccl brush and its supports io lahcrcl'orc obtained.

The circuit-wire for ouch pair of brushes is connected in u post, a, on iaho 'costing A, as clearly illustrated in and 2.

Hcrotoi`orc, so for as I am aworo, whore wind-bluish@ have bccu employed, hc whccl has been otocu ou zia sloionary zi-xlc or pin.

rcuult was, that when *che wheel become little worn thcrc was o sliding motion on the pin, which soon worc out bolli @lic pin aud the wheel. lu my improved construction, howvw cvcr,tlxc'wl1ccl is fast ou thc piu or axle, which rotates iu bearings on cach silla ci" hc wheel'. By employing a sprngnger I obtain a good AContact bctfwccn thc wheel and the. bearing iu which its pin or oy e turns. This is desirable, because otherwise tliclubricutiou of thc beziring oi' clic wliccl would tend to increase the resistance of ho coumcis. The sumo result may of course be ob'rziiuc by letting the sprng-ugcr bear on thc sido o' the wheel as close to its axle as possible, so as. to hold io iu contact wish its bearing.

` The spindle Eef thc wheel-brush is formed with a shouhlcr at f, and carries ai, its cud a collar, g, which slides loosely on the Spindle, but is prevented from turning thereon by a cross-pin, h, iu thc end of the Spindle, which lies in slots g/ in che ,sides 0i the collar.' A Coil-Spring, which embraces thc spindle, is interposed bctwecu the shoulder f of the collar g, Sofas normally to press tfno collar away from che shoulder. A, spindo husorgouizcd is inserted iu its sockcb c in the casting A, as clearly show-nin Scctiou in Fig. l. Screw, in, which works in the oido of thcsoc'ici c, binds tho collar g. ly mldiuslzing the collar in he Sochct and scouring it rmly by the Seb ocra, it is obj/icuii thai; the prcssurc of the vuccrlorush on the commutator-rng may De A Set J live degrees to leach other.

z v caress Y screw will hold the collar, and thepin h in the end of the wheel-spindle will preventthe wheel from turni ng. With this organization, therefore, the pressure ofthe wheel upon the ring and 'its proper angular relation to the ring may be maintained. TheplungersorspindlesEwhich carry the wheels are arranged in radial lines from the center of the commntator. Variations of size in the commutator-rings will not thereforc'change the points of contact between the ccmmutator-rin'g aud the wheellbrushes. vThe spindles or plungers of each pair of brushes are shown as set at an angle of forty- This, however, may of course be varied, and forms no feature of my present invention.

In order to maintain the brush in proper position relatively to the ringthat is, with the plane of the brush at right angles to the axis of the ring-the ring may be grooved and the brushes formed with correspondinglyshaped peri phcries to 'run in the groovesn This is illustrated ir.l Figs, land 5. In that euse, as illustrated in Fig. 5, the slots g in the -collar and the pin hin th'e end of the brushs'pindlc may of course be dispensed with.

As indicated at the beginning of-this specification, .I am of course aware that wheelbrushcs are very old, and I do not therefore attempt to claim such broad ground The use of such brushes possesses many advantages,

the `principal of friction.

l. ln a corumutator for electric motors or dynamics, the combination of the casting in which the socket for the wheel-brush spindle is formed, the wheel-brush and its Spindle, the' collar andspring on the spindle, and the setscrew.

which is the reduction of 2. In a commutator for electric motors or dynamos, the combination of the casting in which the socket for the wheel brush spindle is formed, the wheel-'brush and its spindle, the slotted collar and spring von the spindle, and

the crosspin in the spindle'.

3. In a commutator for. electric motors or dyamo's, the combination of the casting in which the socket for the wheel-brush spindle is formed, the whel-hrnsh and .its spindle, the slotted. collar and' spring on the spindle, the crosspin in the spindle, and .the set-screw in the side of thespindieseclret which binds'the collar in place, I l

4. In a commu'iator for electric motors or dynamos, the combination of the commutatorring, the Wheel-brush, the axle or pin on which the 'crush is rigidly mounted, and the bearings for said pin,l f y In a eonirnutator fuor electric motors or dynaznos, the combination, set forth, or" the cominutatorring, a wheel.

substantially as4 brush which runs thereon, and aspiring-finger 7. In a conxmutator for electric motors or' dynarnos, the combination, substantially as set which holds the wheelyin contact'with its conl forth, of the end plate, thecasting A, the4 eomrnutntor ring, the wheclbrushes, their spindles, and the radial sockets'ior the spindiesin the casting. 'f

In testimony whereof I have hereunto subscribed my name.. y*

LEVI WILLIAM STOCKWELL.

Witnesses: A.. 8.5. AIslnwisnnnr,

- L. Si. Fiss., Y 

